Arkolith/Insider Trading/CTKB/Form 4

McCombe William D.

Chief Financial OfficerCytek Biosciences, Inc. (CTKB) · full profile →Form 4 · filed May 20, 2026
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
9
6 non-derivative · 3 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
May 18, 2026Option exercise(M)6K——101K
May 18, 2026Tax withholding(F)2K$3.55$8K99K
May 18, 2026Option exercise(M)9K——107K
May 18, 2026Tax withholding(F)3K$3.55$11K104K
May 18, 2026Option exercise(M)11K——115K
May 18, 2026Tax withholding(F)4K$3.55$14K111K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
May 18, 2026Option exercise(M)6K—$051K
May 18, 2026Option exercise(M)9K—$0148K
May 18, 2026Option exercise(M)11K—$0246K

Transaction Codes

M
Option exercise / conversion
F
Shares withheld for taxes

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001878824-26-000002) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML